Welding apparatus



2 sheets-'sheet 1 Filed Jan. 2 4, 1927 @lunar/naga Patented June 7, 1932 l UNITED-STATES PATENT oFFIcr-z` ROHAN STRAIITZ, OF DETROIT, MICHIGAN, ASSIGNOR, BY 'MESNE ASSIGNMENTS, TO

CHRYSLER CORPORATION, A CORPORATION OF DELAWARE WELDING APPARATUS vApplication led January 24, 1927. Serial No. 183,279. l

with the bearing block secured to the low- The invention relates to Welding apparatus and has particular reference to spot Welders. One of the objects of the invention is' to provide a portable Welder which may be of'Flgure 1. v

readily moved about and applied at various locations. Another object is to rovide an improved construction of Welder aving but few jointsbetween the part-s forming thev electricalcircuit through which the electrical current passes to the electrodes to thereby increase the eilciency of the Welder. A further ob'ect is 'to provide a construction of Welder avin the electrical switch for controllin the e ectrical current passing to the electro esas well as the means for relatively movin the electrodes toward each other so locate that'they are easily accessible. With these as `Well as other objects: in view, the invention resides in the novel -features of construction ad combinations and arrangeparts as more fully hereinafter set Figure 1V is a side elevation partly in section ofa welding apparatus embodying my mvention;

, Figure 2-is a plan view thereof Figure 3 is an end view thereof;

Fi re 4 is a cross section on the line 4-4 The welding apparatus is dexigned to per- Welder aboutand'to operate the same. The

Welder has a frame comprising up r and lower arms'l..` and 2, respectively, w 'ch are preferably formed of cast aluminum to make the frame as light as possible. These arms are pivotally, connected intermediateA their ends by the pivot 3 which extends through the depending bifurcations 4 upon the upper larm and the upwardly' extending lug 5 upon T are, respectively, the upper and lower cooperating electrodes the llower arm. `6` and i' `respectlvely mounted u on the upper and lower' arms at one end-t ereof. For swinging the arms relatively to each otherto move lthe electrodes relatively toward each other,

`Irhaue provided the cam 8 located at the op-` posite endsof the arms and pivotally conu `nected 'at 9 to the upper armA and engageableer arm. This cam has secured thereto the actuatmg handle 11 which preferably extends at an angle to one side of the lower arm and vdepends to a point therebeneath. 12 are coil springs having their upper and lower ends connected respectively to the upper and lower arms at polnts between thefcam 8 and the pivot 3, these coil springs tending to swing the arms relatively to each other to separate the electrodes. e

To provide electrical conductors leading to the electrodes with but few joints between the parts forming the conductors to thereby increase the ehciency of the Welder, I have formed electrical conductors for the upper and lower conductors which are respectively mounted'upon the upper and lower arms 1 member 14 which is mounted upon the upper arm 1 above the upper electrode 6. This suitable means such as the ca screws 15 which are insulated from th'e con uctor member by the insulator bushings 16 and insulator washers 17, A18 is an insulator plate between the conductor member and the arm for insulating the former from the'latter. 19 is a plug extendin downwardly through the conductor mem er 14 andin -th e lower end of which is screwed the upper electrode 6. This plug is also insulated from the upper arm by 'means of the insulator bushing 20. For

rigidly securing the plug in the conductor member, I have provided the cooperatin clamping blocks 21 and 22 Which exten transversely of theconductor member and are clamped against the plug by means of the cap screw 23.- The electrical conductor for the lower electrode 7 comprises the lower terminal member 24 to which one,end of the 'conductor' member is secured to the arm by electrical cable leading fromthe transformer" is connected. This terminal member is rigidly secured to the lower conductor member 25 which is ri 'dlysecured to the lowerv arm 2 and has the ss 26 at one end in which the lower electrode is rigidly mounted. The lower conductor member 25 has the yoke portion 27 through which the upper arm 1 extends and the lower terminal is connected to one side of this yoke portion. At the other side of this yoke portion is mounted the electrical switch 28 connected by the wires 29 to the primary of the transformer. It is to be noted that the switch which controls the flow of electrical current to the electrode is mounted at the same side of the pivot connecting the upper and lower arms as the cam for relatively swinging these arms so that one man may easily operate both.

To make the welder portable so that it may be readily moved about and applied at var1- ous locations in a steel body which is being assembled, for example, I provide means for yieldably suspending the Welder and also provide means upon the welder frame for moving the same about. This latter means comprises the handles 30 and 31 which are rigidly connected to the opposite ends of the up r arm l. The former means comprises the eX- Uli ible connection in the nature of a cable 32 eX- tending over a pulley 33 above the welder and connected at one end to the counterweight 34 for the welder and at its other end to the U" shaped bracket 35 which is rigidly secured to the upper conductor member 14 as by means of the cap screws 36; `This bracket is insulated from the conductor member by means of the insulator plate 37 between the bracket l and the conductor member and the insulator bushings 38 surroundingl the ca screws. To

avoid interference with the wor en the low voltage cable connected to the secondary of the transformer as well as the wires between the switch upon the Welder and the trans-v former primar -are also preferably` yield# ably suspende welder. p

What I claim as my invention is: 1. Inwelding apparatus, a welder having l.from a point above the electrical switch upon one o f arms and wires leading upwardly above said arms from said switch, of means connected to the upper of said arms for yieldably suspending said Welder to form a portable welder.

3. In welding apparatus, the combination r nature. ITZ.

an upper arm and a lower arm pivotally con` nected to said upper arm, a conductor member mounted upon said lower arm, an electrode mounted directly upon said conductor member, a conductor member mounted u n and insulated from said u per arm an an electrode directly mounte upon said last mentioned conductor member and adapted to cooperate with said first mentioned electrode.

2. In welding apparatus, the combination with a welder having'upper and lower arms pivotally connected to 'each other intermediate theirends, cooperating electrodes at one end of said arms, a cam at'the other end of said arms for swinging said arms relative to each other, hand grips at the opposite ends of one of said arms, electrical conductors leading to said electrodes and includingcables extending from a point above said arms, an 

